Flat Roof Target U Value

Existing buildings do not require a target co2 emissions rate however they do require a target u value to meet for building elements walls floors and roofs.

Flat roof target u value.

If you have a target u value in mind then the calculator will give you the thickness of insulation needed. Then simply adjust the thickness or the u value until you are happy and the calculator will do the rest. Column b is for other extensions upgraded existing thermal elements non exempt conservatories and conversion of unheated. For the majority of flat roofs built up in a series of material layers each of a consistent thickness and performance the most appropriate calculation type is the combined method detailed in bs en iso 6946.

The quick free and easy way to find out the insulation thickness and the u value you need for your building project. The target u value for flat roofs on existing buildings other than dwellings are shown in table 4 below. 0 18w m k 140mm of walltite. Insulation for flat roofs pitched roofs and balconies and terraces.

This u value calculator covers all the main ways of building walls flat roofs pitched roofs and floors using kingspan insulation. Get a u value calculation from our free online u value calculator or our technical department. Where a building has external walls with a u value poorer than 0 7 and a roof with a u value poorer then 0 25 then the more. Using a target based methodology for new buildings in standard 6 1.

Check out our guide on what performance is required for the uk insulation building regulations. The u value calculator covers all the main ways of building walls flat roofs pitched roofs and floors using kingspan insulation products. Ecotherm s u value calculator is simple to use easy to tweak and provides an instant u value. 0 25 column a is for extensions where the existing dwelling s walls and roof u values are worse than 0 70 w m k in the walls and worse than 0 25 w m k in the ceiling.

Walltite is applied directly to the underside of the plywood decking between the roof joists. Unsure what level of thermal performance you require. Insulation for walls including cavity walls solid walls and timber or steel framed walls. Flat roof or pitched roof insulation between rafters or roof with integral insulation.